Living with a complex, chronic health condition like type 1 diabetes (T1D) is complicated, expensive, and burdensome. Most people live long, happy, healthy, and satisfying lives with T1D, yet there is a large body of evidence that mental health concerns and behavioral challenges are common, and interfere with self-management, quality of life, and health. At the same time, there are not enough professionals who have knowledge of the complex interplays between diabetes and psychosocial factors to meet the needs of the large and growing population of people with T1D, and their families. To help address this gap, the Type 1 Diabetes Mental Health Workbook was created to provide a concise, practical resource for mental health clinicians and therapists to use in their care of young people with T1D. The workbook is divided into eight sections: Overview of T1DLanguage and communication about T1DChallenges associated with a new T1D diagnosisApproaches to addressing T1D self-management challengesEmotions associated with T1DMood concerns and T1DT1D-related worries and anxietyAdditional considerations